CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; South China Sea Marine Environment Monitoring Center, SOA, Guangzhou 510300, China; University of Chinese Academy of Sciences, Beijing 100049, China.
CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China.
Mar Pollut Bull. 2017 Nov 15;124(1):547-554. doi: 10.1016/j.marpolbul.2017.07.069. Epub 2017 Aug 2.
Nutrient and heavy metal (Fe, Mn, Ni, Cu, Pb, Zn, Cr, Cd and As) concentrations in porewater in sediment cores and their diffusive benthic fluxes were investigated in Daya Bay, South China, to study the accumulation and transfer of nutrients/metals at the sediment-water interface, and to discuss the impact of human activities on nutrients/metals. Nutrients and heavy metals displayed different profiles in porewater, which was mainly attributed to the distinct biogeochemical conditions in sediments. Total mean fluxes of nutrients (except NO and NO) and metals in study area were positive, indicating nutrients and metals diffused from the sediment to overlying water, and sediment was generally the source of nutrients/metals. Human activities and the weak hydrodynamic force made nutrients/metals accumulate in sediment, so the sediment should be paid more attention to as the endogenesis of contamination in Daya Bay waters.
在大亚湾，研究了沉积物柱中孔隙水的营养物质和重金属（Fe、Mn、Ni、Cu、Pb、Zn、Cr、Cd 和 As）浓度及其扩散底栖通量，以研究营养物质/金属在沉积物-水界面的积累和转移，并讨论人类活动对营养物质/金属的影响。孔隙水中的营养物质和重金属呈现出不同的分布模式，这主要归因于沉积物中截然不同的生物地球化学条件。研究区域中除了 NO 和 NO 之外的所有营养物质和金属的总平均通量均为正值，表明营养物质和金属从沉积物向覆盖水扩散，而沉积物通常是营养物质/金属的来源。人类活动和较弱的水动力使营养物质/金属在沉积物中积累，因此，作为大亚湾水域内生污染的源头，沉积物应该受到更多关注。
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